/Engine/Source/Editor/Kismet/Public/BlueprintEditor.h
Move the given set of nodes to an average spot near the Source position
void MoveNodesToAveragePos ( [TSet](API\Runtime\Core\Containers\TSet)< [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) * > & AverageNodes, FVector2D SourcePos, bool bExpandedNodesNeedUniqueGuid ) const